76816919 has 4 divisors (see below), whose sum is σ = 77608944. Its totient is φ = 76024896.

The previous prime is 76816913. The next prime is 76816967. The reversal of 76816919 is 91961867.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 76816919 - 2¹⁶ = 76751383 is a prime.

It is a super-2 number, since 2×76816919² = 11801678089305122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76816913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395867 + ... + 396060.

It is an arithmetic number, because the mean of its divisors is an integer number (19402236).

Almost surely, 2^76816919 is an apocalyptic number.

76816919 is a deficient number, since it is larger than the sum of its proper divisors (792025).

76816919 is an equidigital number, since it uses as much as digits as its factorization.

76816919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792024.

The product of its digits is 163296, while the sum is 47.

The square root of 76816919 is about 8764.5261708777. The cubic root of 76816919 is about 425.0946391318.

The spelling of 76816919 in words is "seventy-six million, eight hundred sixteen thousand, nine hundred nineteen".